Bug 1224975 (CVE-2021-47295) - VUL-0: CVE-2021-47295: kernel: net: sched: fix memory leak in tcindex_partial_destroy_work
Summary: VUL-0: CVE-2021-47295: kernel: net: sched: fix memory leak in tcindex_partial...
Status: IN_PROGRESS
Alias: CVE-2021-47295
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Michal Koutný
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/406929/
Whiteboard: CVSSv3.1:SUSE:CVE-2021-47295:5.5:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2024-05-22 12:35 UTC by SMASH SMASH
Modified: 2024-07-11 13:43 UTC (History)
2 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

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Description SMASH SMASH 2024-05-22 12:35:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: sched: fix memory leak in tcindex_partial_destroy_work

Syzbot reported memory leak in tcindex_set_parms(). The problem was in
non-freed perfect hash in tcindex_partial_destroy_work().

In tcindex_set_parms() new tcindex_data is allocated and some fields from
old one are copied to new one, but not the perfect hash. Since
tcindex_partial_destroy_work() is the destroy function for old
tcindex_data, we need to free perfect hash to avoid memory leak.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47295
https://www.cve.org/CVERecord?id=CVE-2021-47295
https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62
https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47295.mbox